/ Dictionary / Index D decarboxylase: Meaning and Definition of Find definitions for: de•car•box•yl•ase Pronunciation: (dē'kär-bok'su-lās", -lāz"), [key] — n. Biochem. any of the class of enzymes that catalyze the release of carbon dioxide from the carboxyl group of certain organic acids. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: decarboxylase (Thesaurus) decarbonylate decarboxylate Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language